“Runtime boundaries type validation” or “full stuck type-safe” - all this talking about the ability to validate data types from external sources.
It can be any API or WebHook Call, third-part form validation, DB query results, or file content (such as JSON or CSV).
Let’s see how we can define runtime types for the expected data that can be validated while the application runs to create a smooth developer experience with strong assurances of correctness at build time.